Projectile Launcher Shell Coating Across Part Lines
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Solution Overview
Problem
Existing projectile launchers, particularly toy and hobby models, face challenges in applying detailed decals that seamlessly cover substantial areas without being interrupted by part lines or angled surfaces, limiting design nuance and visual continuity.
Innovation Solution
A method involving ink deposition and assembly of shell parts with sub-coatings applied to contiguous surfaces, ensuring visual continuity across abutting edges using inkjet printing, allowing for a cohesive decal coating on toy projectile launchers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional printing methods (stickers, pad printing, embossed geometry) are used on injection moulded plastic parts, then manufacturing is simplified and parts can be produced efficiently, but design nuance and visual continuity are limited by part lines and assembly joints
Solution Approach 1:
The shell is divided into multiple injection-moulded parts for manufacturing efficiency, but the decal coating is applied continuously across all parts to create the visual effect of a single seamless surface, resolving the contradiction between manufacturing segmentation and visual continuity
Solution Approach 2:
The decal coating is applied to the shell parts before final assembly, allowing the coating to be deposited on each part individually while ensuring that adjacent parts receive coating that will align and appear continuous when assembled
2Productivity
If the shell is divided into multiple injection moulded parts for manufacturing efficiency, then production cost and complexity are reduced, but visible part lines and assembly joints interrupt the visual continuity of decals
Solution Approach 1:
The shell is segmented into multiple injection-moulded parts to maintain manufacturing efficiency while the decal coating process is designed to bridge these segments, creating visual continuity across part lines through careful alignment and overlapping deposition on adjacent parts
Solution Approach 2:
Different regions of the shell receive coordinated decal coating treatments, with adjacent parts receiving complementary coatings that align at part lines, ensuring that each local area contributes to the overall visual continuity while maintaining manufacturing efficiency
3Ease of operation
If decals are applied after assembly, then alignment is simpler, but it is impossible to achieve visual continuity across abutting parts
Solution Approach 1:
The decal coating is applied to individual shell parts before assembly, with each part receiving its designated portion of the overall decal pattern. This preliminary application allows precise control over coating alignment at part interfaces, achieving visual continuity that would be impossible if applied after assembly
4Adaptability or versatility
If more shell parts are used to form the outer shell, then design flexibility and manufacturing efficiency improve, but the number of part lines and assembly joints increases, interrupting decal continuity
Solution Approach 1:
The shell is divided into multiple parts to enhance design flexibility and manufacturing efficiency, while the decal coating process is designed to seamlessly connect these segmented parts, creating an aggregate coating that appears as a continuous visual surface despite the underlying segmentation
5Manufacturing precision
If inkjet printing is used to deposit sub-coatings on shell parts, then detailed decals with high design nuance can be achieved, but the process complexity and manufacturing steps increase
Solution Approach 1:
Traditional mechanical decal application methods (stickers, pad printing, embossing) are replaced with inkjet printing technology, which uses digital deposition to apply sub-coatings. This substitution enables high-detail decals with superior design nuance while the printing process is integrated into the existing manufacturing workflow
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enables a visually continuous decal coating across abutting shell parts, enhancing design detail and aesthetic appeal without visible interruptions, addressing the limitations of traditional printing methods.
Implementation Method 1
depositing ink on shell parts to form sub-coatings
Data Source
AI summary
A non-lethal projectile launcher toy that comprises a full-colour, high DPI, printed aggregate coating on an outer shell (101, 301); the decal coating is not limited to flat surfaces, allowing for substantially unrestricted product design, and is substantially undisturbed visual continuity when crossing part lines between discrete parts that make up the outer shell. Methods of producing the decal-coated toy gun using inkjet printing technology are also provided, allowing for high-detail and comprehensive colour range aggregate coatings that may be programmatically controlled to maximise the visual quality of the applied decal.